激素与受体的结合叙述错误的是()
A.为特异性的
B.为非特异性的
C.是可逆的
D.符合质量与作用定律
E.二者结合才能启动其生理活性
参考答案:B
M: I wish I hadn’t thrown away that reading list!W: I thought you might regret it. That’s why I picked it up from the waste paper basket and left it on the desk.Q: What do we learn from the conversation().
A. The man regrets being absent-minded.
B. The woman saved the man some trouble.
C. The man placed the reading list on a desk.
D. The woman emptied the waste paper basket.
销售与收款业务循环中,用来表示由于销售退回或经批准折让而引起的应收账款减少的凭证是:
A.销货合同
B.销货单
C.贷项通知单
D.客户订货单